About this replacement
Motorola Moto Edge / Moto Edge 5G — 3.87V Li-Polymer Replacement Battery (LR50)
This is a 3900mAh (15.09Wh) Li-Polymer cell built to replace the OEM LR50 battery in the Motorola Moto Edge and Moto Edge 5G. It fits XT2063-2 and XT2063-3 variants. Voltage runs at 3.87V nominal, matching the original cell spec exactly.
- XT2063-2 and XT2063-3 compatibility: Both variants run on the same 3.87V power rail with the same flex connector and BMS handshake protocol. One cell covers both board revisions without modification.
- Bench tested on actual hardware: We cycled this cell through a full charge and discharge on an XT2063-3 unit. The BMS accepted the cell without fault codes, and the charge IC stepped through trickle, CC, and CV phases cleanly.
- Fuel gauge recalibration on first install: After fitting this cell, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated state.
Sudden shutdown at 20–30% on the Moto Edge after a cell swap
This happens when the fuel gauge IC is still calibrated to the old cell's discharge curve. The new cell hits a voltage cliff — typically around 3.5V under modem or screen load — faster than the IC expects, causing the OS to read 20–30% right before the phone shuts off. It is not a defective cell. One full discharge-charge cycle at standard rate lets the coulomb counter reset its endpoint and recalculate remaining capacity against the actual new cell behavior.
USB-PD fast charging not recognised on the first cycle after replacement
On the first cycle, the BMS on a fresh Li-Polymer cell may not immediately signal readiness for high-current input to the charge IC. The phone falls back to standard 5V charging until the cell voltage climbs above roughly 3.6V and the BMS handshake completes. Plug in, let it charge fully at standard rate once, then unplug and replug. Fast charging should activate normally from the second cycle onward.